perplexus.info :: Just Math : Dozen Divisibility Dilemma

Dozen Divisibility Dilemma (Posted on 2010-12-02)

Each of x and y is a positive integer such that: x² – 5y² = 1.

Prove that x*y is always divisible by 12.

Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Solution: (Hide)

Refer to the comments by broll, Jer, and Harry in the comments section.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
re(2): Possible solution	broll	2010-12-04 00:15:06
re: Possible solution	Harry	2010-12-03 21:26:03
re: Possible solution	Jer	2010-12-03 17:52:28
Possible solution	broll	2010-12-03 04:49:42

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